What is this gun worth??? Remington 700 custom in .257 wby

I am considering buying this gun and would like to know what a fair price to pay would be?

It is a custom Remington 700 with extended bolt handle/knob, HS Precision stock, Shilen #4 fluted barrel (stainless match grade) in .257 wby mag, jewell trigger. They are asking around $900 for it. The barrel has 15 shots on it and he will guarantee it to shoot sub .5 moa @ 100 yards. It was built by a quality gunsmith locally and is in excellent condition. The action has been used on another gun, everything else is new.

What would be a good price for this gun? I am going to reload so Im not concerned with .257 wby ammo prices. This will be used for whitetails, hogs, and a few coyotes here and there. Any reason why I shouldn't buy a .257?

I have a very similar rifle I had built many years ago. Of my 15 rifles it is my favorite to shoot and is my go to gun for deer and smaller game at moderate ranges (400yds or less). I know it will shoot farther than this, but I shoot factory 100gn BTs and the scope currently on it doesn't have turrets. My rifle will put three rounds under a dime at 100yrds every time if I drive it right.

I don't know what that rifle is worth to you, but mine is not for sale at any price.